Trump nominates 10th Circuit Judge Neil Gorsuch to the Supreme Court.

Republican donor Betsy DeVos is confirmed as education secretary with a historic tie-breaking vote cast by Mike Pence — one of the most contentious confirmations ever.

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Michael Flynn resigns as National Security Adviser amid uproar over his communications with Russian officials.

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Trump announces that "the time for trivial fights is behind us" in a his first address to Congress.

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During his address to Congress, Trump honors Carryn Owens, whose husband, US Navy SEAL Ryan Owens, was killed during a raid in Yemen in January. The US-led attack is estimated to have killed 30 civilians, including 17 women and children, and 14 Al-Qaeda fighters.

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Canadian PM Justin Trudeau comes to Washington to announce the Canada-US Council for Advancement of Women Entrepreneurs and Business Leaders.

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Israeli PM Benjamin Netanyahu visits White House and Trump says he "can live with either" a one-state or a two-state solution, backing away from historic US support for Palestinian state.

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Trump tweets that the media is "the enemy of the American people," a day after a wide-ranging press briefing during which he lambasted the press for reporting "fake news" about his administration.

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After weeks of mounting pressure, Trump publicly condemns anti-Semitism in response to attacks on Jewish people and institutions across the country.

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The Trump administration cracks down on undocumented immigrants, speeding up deportations.

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Trump announces $54 billion increase in defense spending.

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Kellyanne Conway provokes outrage after being photographed sitting casually with her feet on an Oval Office couch.

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Attorney General Jeff Sessions recuses himself from investigations into the Trump campaign's ties to Russia after reports emerge that Sessions did not inform Congress of his meetings with the Russian ambassador during the campaign.

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Trump accuses Obama, without evidence, of secretly wiretapping his phones leading up to the 2016 election.

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Trump signs a revised travel ban, scaling back a few of the restrictions, in what Trump calls a "watered down version" of the original executive order. Two federal judges rule against the ban on March 15.

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Trump surprises a White House tour and poses with a young visitor in front of a portrait of Hillary Clinton

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US Attorney Preet Bharara says he was fired by the Trump administration after he refused to resign. Trump, as president-elect, had asked Bharara to stay on.

Secretary of State Rex Tillerson visits the border of North and South Korea, announcing that the US may take pre-emptive action if the country continues expanding its nuclear weapons capability. In this photo, a North Korean soldier covertly photographs Tillerson from behind.

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Trump meets with German Chancellor Angela Merkel to discuss NATO. Trump references reports that Merkel was spied on by Obama in 2013, joking he and Merkel "have something in common, perhaps."

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FBI Director James Comey confirms an investigation into Russian interference in the 2016 election and the Trump's campaign's ties to Russian officials. Comey also tells Congress that he has no evidence to support Trump's claims that Obama wiretapped Trump Tower.

J. Scott Applewhite/AP

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Trump meets with truckers and CEOs at the White House and sits in the front seat of a Mack Truck.

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In a major setback for Trump, House Republicans pull legislation that would have repealed and replaced Obamacare before it can go to a vote.

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Trump signs an executive order rolling back key Obama-era climate policies, including the Clean Power Plan.

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Ivanka Trump announces that she will be an official White House employee, taking on an unpaid position as an adviser to her father, after facing criticism from ethics experts for her previously unofficial role.

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Rep. Devin Nunes announces that he has information that Trump and his associates may have been "incidentally" surveilled by American intelligence agencies, information The New York Times reported was given to him by two White House officials. Nunes says he will continue to chair the committee investigating the Trump campaign's ties to Russia, amid Democrats' protests. In April, Nunes was forced to step aside from the investigation, amid accusations that he misused classified information.

J. Scott Applewhite/AP

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Trump removes his chief strategist, Steve Bannon, from the National Security Council, following widespread condemnation of Trump for appointing a political adviser to a traditionally non-partisan council. This also comes after Gen. H.R. McMaster takes over from Gen. Flynn as the president's national security adviser.

Jonathan Ernst/Reuters

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Republican lawmakers change Senate rules in order to confirm Neil Gorsuch as the next Supreme Court with a simple majority, after the Democrats filibuster the vote. This move is called the 'nuclear option' and marks the first time a nominee to the Supreme Court has been confirmed with less than 60 votes.

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Jared Kushner, the president's son-in-law and senior adviser, visited Iraq to meet with Iraqi Prime Minister Haider al-Abadi, Iraq's minister of defense, and US military officials.

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Trump meets with the Chinese president at his Florida resort. A few days later, the president says he will no longer call China a currency manipulator.

Carlos Barria/Reuters

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Trump orders a cruise missile attack on a Syrian government airbase in response to the government's chemical weapons attack that killed hundreds of Syrian civilians, including children.

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Neil Gorsuch is sworn in as the 113th justice of the Supreme Court. Gorsuch's confirmation is widely seen as Trump's most significant achievement in his first 100 days in office.

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Trump and his special assistant for infrastructure present a chart illustrating the regulations surrounding highway construction during a White House town hall for CEOs. Trump reaffirms his pledge to pass a $1 trillion infrastructure bill.

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Reports emerge of increasing tensions between warring factions in the White House led by chief strategist Steve Bannon and senior adviser Jared Kushner. Bannon is seen as representing a more nationalist, isolationist worldview, while Kushner is described as more moderate and interventionist.

Pablo Martinez Monsivais/AP

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White House Press Secretary Sean Spicer sparks outrage when he claims that Adolf Hitler "didn't even sink to using chemical weapons" during World War II. Reporters quickly point out that Hitler killed millions of Jews and others in gas chamber. Spicer later apologized for his remarks, which were made in defense of Trump's decision to retaliate against the Syrian government following its chemical weapons attack.

Jonathan Ernst/Reuters

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Trump drops the US's most powerful non-nuclear bomb on an ISIS target in Afghanistan. The bomb, officially the Massive Ordnance Air Blast Bomb (MOAB), is colloquially known as the "mother of all bombs." This marks the first time the weapon has been used in battle. The attack reportedly killed dozens of militants.

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Trump hosts the annual White House Easter Egg Roll.

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Sarah Palin, the former Alaska governor and Republican vice presidential nominee, and musicians Ted Nugent and Kid Rock visit President Donald Trump at the White House.

Vice President Mike Pence goes on a 10-day trip to visit South Korea, Japan, Indonesia, Australia, and Hawaii. Pence cut his trip short, racing back to Washington to help the White House with its tax reform proposal before the 100-day mark.

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On his 97th day in office, Trump unveiled a basic outline of his proposed tax reform, which would dramatically cut taxes for individuals and businesses with significant benefits for the wealthy.

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Trump says he fears a "major, major conflict" with North Korea amid increasing tensions between the US and the Asian country.

Wong Maye-E/AP

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Trump has taken 78 executive actions — 30 executive orders, 20 proclamations, and 28 presidential memorandums — during his first 100 days in office.

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In his first 100 days, Trump has spent 7 weekends at his Florida resort, Mar-a-Lago, which has amounted to $21 million in security and travel costs. He's also taken 19 trips to golf courses.